King's Gambit, McDonnell Gambit


The McDonnell Gambit is a chess opening gambit in the King's Gambit, Classical Variation that begins with the moves:
or alternatively via the Quaade Gambit:
The opening is named after Alexander McDonnell, a 19th-century Irish chess master, who successfully introduced it in his third match with Louis-Charles Mahé de La Bourdonnais. The aim is to gain a significant lead in for the sacrificed knight, followed by a attack.
The McDonnell Gambit has always been much less popular for White than the similarly motivated Muzio Gambit. Although considered obsolete by MCO, it has not been thoroughly tested.

5...gxf3

After 5... gxf3 6. Qxf3 is usual, though the wild 6.0-0 is occasionally seen. Now 6...Bh6 is regarded as inferior. Better options for Black are:
1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Nc3 gxf3 6. Qxf3 Bh6? 7. d4 Nc6 8. 0-0
8... Nxd4 9. Bxf7+!
9... Kxf7 10. Qh5+ Kg7 11. Bxf4 Bxf4 12. Rxf4 Nf6 13. Qg5+ Kf7 14. Raf1
14... Ke8 15. Rxf6 Qe7
16. Nd5! Qc5
17. Kh1! Ne6
18. Rxe6+! dxe6 19. Nf6+!
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Maróczy vs. Chigorin, Vienna 1903

1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Nc3 gxf3 6. Qxf3 d6! 7. d4 Be6 8. Nd5 White can try 8.d5 Bc8 9.Bxf4 as in Dufresne–Anderssen, Berlin 1851. 8... c6 9. 0-0 cxd5 10. exd5 Bf5 11. Bxf4 Bg6 12. Bb5+ Nd7 13. Rae1+ Be7 14. Bxd6 Kf8? Black had a clear advantage after 14...Qb6! 15.Qa3 Qxd4 16.Rf2 Be4 17.Bxe7 Nxe7 18.d6 Rg8 19.Rxe4 Qxe4 20.Re2 Qxe2 21.Bxe2 Nc6 in Barth–Lenz, 1913. 15. Rxe7 Nxe7 16. Re1 Kg7 17. Bxe7 Qa5 18. Qe2 Nf8 19. Bf6+ Kg8 20. Qe5 h6 21. Bxh8 f6 22. Qe7 Kxh8 23. Qxf6+ Kg8 24. Re7 1–0

Alternatives to 5...gxf3

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Nc3 d5 6.Bxd5 gxf3 7.Qxf3 Nf6 8.Qxf4 Be7 9.0-0 0-0 10.b4 a5 11.Bb2 axb4 12.Ne2 Ra6 13.Qh6 Kh8 14.Nf4 Rg8 15.Bxf7 Bf8 16.Qh5 Rg4 17.Ne6 Bg7 18.Bxf6 1–0